The purpose of medication after stenting is mainly to prevent thrombosis and restenosis, the main drugs are as follows: 1. Anti-platelet drugs, aspirin 75-162mg, once a day, for a long time. Clopidogrel hydrogen sulfate 75mg, once a day, this drug is generally taken for more than 1 year, if economic conditions allow, it is recommended to take long-term oral, after 1 year can be changed to domestic TEGA (clopidogrel hydrogen sulfate 25mg/tablet), once 50mg, once a day. 2, statin lipid regulating drugs, generally commonly used rasuvastatin, atorvastatin, simvastatin, etc.. Even if the cholesterol is normal, it should be taken. This drug has proven to have positive significance in preventing in-stent restenosis and new coronary atherosclerosis and stenosis, and even reversing the formation of atheromatous plaques. It is used for a minimum of 6 months to 1 year. Long-term use is recommended if there are no side effects. 3.β-blockers, such as metoprolol succinate and metoprolol tartrate, are recommended for long-term use if there are no contraindications and the heart rhythm at quiet is not less than 50-55 beats/min. 4, hypertension and diabetes patients long-term use of antihypertensive drugs and hypoglycemic drugs, smoothly control blood pressure and blood sugar within the normal range, many types of antihypertensive drugs at the same time have the role of protecting the structure and function of the heart. 5.Nitrate drugs are beneficial to be taken for a short period of time after stenting for coronary artery disease. The dose and duration of the drugs need to be adjusted according to whether the patient has angina and ischemic performance after stenting. For patients who have not dilated all severe stenotic lesions, generally long-term use of isosorbide mononitrate tablets (Xinkang, Imdo) after surgery can help control the onset of angina symptoms in coronary artery disease; for patients who have dilated all stenoses, generally 1-2 weeks after surgery to take the above drugs to prevent coronary spasm.